Dyeing and printing



Patented June 11, 1929.

UNITED STATES PATENT OFFICE,

HEBMANN MIJ'LLER, OF BASEL, SWITZERLAND, ASSIGNOB T FIRM? J". R. GEIGY.A.,

. OF BASED, SWITZERLAND.

DYEING AN D PRINTING.

No Drawing. Original application filed Tune 30, 1924, Serial No.723,393, and in Germany July 23, 1923.

Divided and this application filed September 19, 1925. Serial No.57,447. I

This application is a division of the appli cation Ser. No. 7 23,393filed June 30, 1924.

In the specifications of U. S. Letters Pat out No. 1,485,790 and itsdivisional application Ser. No. 644,244, it is stated that dye stufl'sin watery solution can be fixed fast at ordinary temperatures on thematerial to i be dyed by the action of chlorinated acetic acid, glycolicacid, lactic acid, malic acid, oxalic acid or phosphoric acid. I havenow discovered that neutral substances, particularlyethylenethiodiglycol of the formula (GHLCHLOH also have the samedesirable property, and furthermore have'the great advantage that byusing them the strongly acid solutions and wastes with their unpleasantconsequences 2 are avoided. The watery or alcoholic solutions preparedwith ethylenethiodiglycol have no corrosive effect on the membrane ormucous membrane of the eyes and the respiratory organs. This advantageis of specialimportance in the spraying process. Furthermore thedyestuif solutions containing monochloracetic acid owing to their highacid content cannot be used for printing silk highly charged with tin,whilst the new dyestuff solutions containing ethylenethiodiglycol can beused satisfactorily for this purpose.

- The printing, dyeing, spraying of wool,

B silk, cotton and other textile fabrics as well as wood, feathers,hair, paper, straw, and arti- 339,690 and in \its ficial substances isaccomplished as exemplified in the following examples.

EXAMPLE I.

Printing and dyeing for cotton and silk mixed with cotton.

a. Printing.

1 gr. ofbasic dyestufi (for instance setocyanine) is dissolved hot in 32gr. of water and 4,5 gr. oflgcetic acid (of 80 per cent), then 10 gr. ofethylenethiodiglycol,

2, 5 gr. of tannin and 50 gr. of starch-tragacanthgum-thicken- 'ing.

The material is printed with this printing dye, well dried, and withoutsteaming is passed through a cold or luke-warm tartar emetic bath, whichas usual contains 10 gr. of tartar emetic to 1 litre of liquor. Then itis well washed and soaped.

b. Dyeing bath corresponding to Example I for cotton and silk mined withcotton. 1 gr. of basic dyestuff (for instance setocyanine) is dissolvedhot in 32 gr. of water and 4, 5 gr. 0(f1 acetic acid (of per cent), thena d I 10 gr. of ethylenethiodiglycol 2, 5 gr. of tannin, 40 gr. waterand- 10 gr. of starch-tragacanthgum-thickenn g 100 gr.

The material is passed through this dyeing bath on the padding machineat ordinary temperature, and pressed out, so that the wet material showsa per cent increase in weight.

It is then well dried and without steaming is passed through the usualbath of tartar emetic, washed and soaped.

EXAMPLE II. p p 5 Printing and dyeing for wool and silk.

a. Printing.

1 gr. of acid dyestuif (for instance acid orange or metanil yellow) and2,5gr. of acetic acid (of 80 per cent) aredissolved in 36, 5 gr. of hotwater then add 10 gr. of ethylenethiodiglycol and 50 gr. ofstarch-tragacanthgum-thickening.

The material is printed as usual, well dried and washed withoutsteaming.

b. Dyeing bath corresponding to Example I! for wool and silk.

1 gr. of acid dyestutf (for instance acid The material is passed throughthis dyeing bath at ordinary temperature on the padding machine andpressed out, so that the wet material shows a 100 per cent increase inweight. It is then well dried and washed without steaming.

EXAMPLE III. Spraying process for cotton, silk mixed with cotton,artificial materials, etc.

1 gr. of dyestuif, for instance safranine extra soluble, is dissolved ingr. of water, then add 25 gr. of alcohol (of 85 per cent) 10 gr. ofet-hylenethiodiglycol,

6 gr. of alcoholic tannin (2 parts of tannin dissolved in 1 part ofalcohol of 85 per cent) and gr. of alcohol (of 85 per cent).

The material is sprayed with the quickly drying alcoholic dyestufisolution. After completely drying it is passed without steaming throughtartar emetic and washed.

What I claim is:

The herein described process for the production of dyeings andprintingfs, consisting in introducing ethylenethiodiglycol into adyestuif solution and applying same on the fibre without steamingoperation. In witness whereof I have hereunto signed my name this 1stday of September, 1925.

HERMANN MULLER.

